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Interrelation Between the Variety and the Mechanical Properties of Flax Fibres

Authors :
S. Eve
A. Thuault
Moussa Gomina
Joël Bréard
Patricia Jouannot-Chesney
Laboratoire Ondes et Milieux Complexes (LOMC)
Centre National de la Recherche Scientifique (CNRS)-Université Le Havre Normandie (ULH)
Normandie Université (NU)-Normandie Université (NU)
Laboratoire de cristallographie et sciences des matériaux (CRISMAT)
École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN)
Normandie Université (NU)-Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Université de Caen Normandie (UNICAEN)
Normandie Université (NU)-Institut de Chimie du CNRS (INC)
Laboratoire d'Ingénierie des Matériaux de Bretagne (LIMATB)
Université de Bretagne Sud (UBS)-Institut Brestois du Numérique et des Mathématiques (IBNM)
Université de Brest (UBO)-Université de Brest (UBO)-Université de Brest (UBO)
Université Le Havre Normandie (ULH)
Normandie Université (NU)-Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)
Université de Caen Normandie (UNICAEN)
Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN)
Normandie Université (NU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA)
Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN)
Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie)
Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN)
Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)
Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Institut Brestois du Numérique et des Mathématiques (IBNM)
Université de Brest (UBO)-Université de Brest (UBO)
Source :
Journal of Biobased Materials and Bioenergy, Journal of Biobased Materials and Bioenergy, 2013, 7 (5), pp.609-618. ⟨10.1166/jbmb.2013.1396⟩
Publication Year :
2013
Publisher :
HAL CCSD, 2013.

Abstract

International audience; This paper presents a large flax fibres varieties intercomparison with the aim of studying the dependence of the mechanical properties (tensile strength, ultimate strain and Young's modulus) on the variety. Thus, a Student's test analysis permits to dissociate the effects of the statistical variations within a large samples population and the effects of the species on the fibres mechanical properties. Results evidenced no significant influence of the variety on the fibres mechanical properties. Experiments show that this can be explained by a similar biochemical composition whatever the species considered, in particular the proportion of cellulose which is the reinforcing phase of the flax fibre. In addition, the cellulose crystallinity rate is the same for all the varieties. Weibull statistical analysis permits to highlight that the flax fibre is as reliable as some synthetic fibre, opening the way to its use as reinforcement in structural composite materials. Furthermore, this analysis evidenced that only one kind of defects involves the fibre breaking. Thus, X-ray tomography permits to experimentally define this type of defects which are cavities, of about 10 m long, constituting the preferential zone of crack initiation leading to the fibre breaking. Therefore, the dispersion of the fibre mechanical properties seems to be due to the number and size of the defects located in the cell walls and also to the usual determination method of the fibre diameter. Finally, it appears that the choice of the cropped variety must be mainly determined by the pedoclimatic conditions and the yields rather than by the expected mechanical properties. The improvement of the cultivation and scutching processes could be the key of the increase of the fibres mechanical properties by limiting the creation of structural defects.

Details

Language :
English
Database :
OpenAIRE
Journal :
Journal of Biobased Materials and Bioenergy, Journal of Biobased Materials and Bioenergy, 2013, 7 (5), pp.609-618. ⟨10.1166/jbmb.2013.1396⟩
Accession number :
edsair.doi.dedup.....5fbf5ba50bb642af888f33d33111f124